Write a C function to solve the system of linear equations A x = y where A is an N by N matrix in the format of pointer-to-pointers and y is a vector in the format of a pointer. The function should return a pointer to the answer vector x. Your function should have the prototype:
double *Gaussian(double **,double *, int).The function should implement the Gaussian Elimination Algorithm with Partial Pivoting.Test your function on the system: